AC_DEFUN(STEPMAKE_GXXCODEGENBUG, [
AC_MSG_CHECKING([options for known g++ bugs])
case "$GXX:$CXX_VERSION" in
- yes:400600?)
+ yes:400600[[0-2]])
AC_MSG_RESULT([-fno-optimize-sibling-calls (tail call bug)])
CXXFLAGS="$CXXFLAGS -fno-optimize-sibling-calls"
;;